Spanish Brandy in Uvinum's blog

Whenever I have to talk about brandy or cognac I have the
certainty that someone will not be happy with my words. But let's
try. We agree that cognac is a type of brandy that is
distilled twice and that comes from white grapes which
origin is close to the French city with the same name, Cognac.
But then what is the brandy? And which type of brandy is brandy
Napoleon?